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if not modules then modules = { } end modules ['m-nodechart'] = {
version = 1.001,
comment = "companion to m-nodechart.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local format = string.format
local points = number.nopts
local ptfactor = number.dimenfactors.pt
local nodecodes = nodes.nodecodes
local kerncodes = nodes.kerncodes
local penaltycodes = nodes.penaltycodes
local gluecodes = nodes.gluecodes
local whatsitcodes = nodes.whatsitcodes
moduledata.charts = moduledata.charts or { }
moduledata.charts.nodes = moduledata.charts.nodes or { }
local formatters = { }
-- subtype font char lang left right uchyph components xoffset yoffset width height depth
function formatters.glyph(n,comment)
return format("\\doFLOWglyphnode{%s}{%s}{%s}{%s}{U+%05X}",comment,n.subtype,n.font,n.char,n.char)
end
-- pre post replace
function formatters.disc(n,comment)
return format("\\doFLOWdiscnode{%s}{%s}",comment,n.subtype)
end
-- subtype kern
function formatters.kern(n,comment)
-- return format("\\doFLOWkernnode{%s}{%s}{%s}",comment,kerncodes[n.subtype],points(n.kern))
return format("\\doFLOWkernnode{%s}{%s}{%.4f}",comment,kerncodes[n.subtype],n.kern*ptfactor)
end
-- subtype penalty
function formatters.penalty(n,comment)
return format("\\doFLOWpenaltynode{%s}{%s}{%s}",comment,"penalty",n.penalty)
end
-- subtype width leader spec (stretch shrink ...
function formatters.glue(n,comment)
return format("\\doFLOWgluenode{%s}{%s}{%.4f}{%.4f}{%.4f}",comment,gluecodes[n.subtype],n.width*ptfactor,n.stretch*ptfactor,n.shrink*ptfactor)
end
-- subtype width leader spec (stretch shrink ...
function formatters.whatsit(n,comment)
return whatsitcodes[n.id] or "unknown whatsit"
end
function formatters.dir(n,comment)
return format("\\doFLOWdirnode{%s}{%s}{%s}",comment,"dir",n.dir)
end
function formatters.localpar(n,comment)
return format("\\doFLOWdirnode{%s}{%s}{%s}",comment,"localpar",n.dir)
end
-- I will make a dedicated set of shapes for this.
local shapes = {
glyph = "procedure",
disc = "procedure",
kern = "action",
penalty = "action",
glue = "action",
}
local function flow_nodes_to_chart(specification)
local head = specification.head
local box = specification.box
local comment = specification.comment or ""
local x = specification.x or 1
local y = specification.y or 0
--
if box then
box = tex.getbox(tonumber(box))
head = box and box.list
end
--
local current = head
--
while current do
local nodecode = nodecodes[current.id]
local formatter = formatters[nodecode]
local shape = shapes[nodecode]
y = y + 1
local next = current.next
commands.flow_start_cell { shape = { framecolor = "nodechart:" .. nodecode } }
commands.flow_set_name(tostring(current))
commands.flow_set_location(x,y)
if shape then
commands.flow_set_shape(shape)
end
if formatter then
commands.flow_set_text("node",formatter(current,comment))
else
commands.flow_set_text("node",nodecode)
end
if next then
commands.flow_set_connection("bt","",tostring(next))
end
if nodecode == "glyph" then
local components = current.components
if components then
commands.flow_set_connection("rl","",tostring(components))
commands.flow_stop_cell()
n = flow_nodes_to_chart { head = components, comment = "component",x = x+2, y = y-1 }
else
commands.flow_stop_cell()
end
elseif nodecode == "disc" then
local pre = current.pre
local pos = current.post
local rep = current.replace
if pre and not rep and not rep then
if pre then
commands.flow_set_connection("rl","",tostring(pre))
end
commands.flow_stop_cell()
if pre then
n = flow_nodes_to_chart { head = pre, comment = "prebreak", x = x+1, y = y-1 }
end
else
if pre then
commands.flow_set_connection("rl","",tostring(pre))
end
if rep then
commands.flow_set_connection("+rl","",tostring(rep))
end
if pos then
commands.flow_set_connection("-rl","",tostring(pos))
end
commands.flow_stop_cell()
if pre then
n = flow_nodes_to_chart{ head = pre, comment = "prebreak", x = x+1, y = y-1 }
end
if rep then
n = flow_nodes_to_chart{ head = rep, comment = "replacement", x = x+3, y = y-1 }
end
if pos then
n = flow_nodes_to_chart{ head = pos, comment = "postbreak", x = x+2, y = y-1 }
end
end
elseif nodecode == "hlist" then
local list = current.list
if list then
commands.flow_set_connection("rl","",tostring(list))
commands.flow_stop_cell()
n = flow_nodes_to_chart { head = list, comment = "list", x = x+2, y = y-1 }
else
commands.flow_stop_cell()
end
else
commands.flow_stop_cell()
end
current = next
end
end
function moduledata.charts.nodes.chart(specification)
commands.flow_start_chart(specification.name)
flow_nodes_to_chart(specification)
commands.flow_stop_chart()
end
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